Improvement in india-rubber soles



R. S. PICKETT.

India Rubber Sole.

No. 73,924. Patented Jany 28;; 186.8.

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Letters Patent No. 73,924, dated January 28, 1868.

IMPROVEMENT IN INDIA-RUBBER SOLE S.

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TO ALL WHOM IT MAY CONCERN:

Be it known that 1, Burns S. PreKaTr, of New Haven, in the county of New Haven, and State of Con- 'necticut, have invented new Improvements in Water-Proof Soles; and I do hereby declare the following, when taken in connection with the accompanying drawings, and the letters of reference marked'thereon, to be a full, clear, andexact description of the same, and which said drawings constitute part of this specification, and represent, in-- Figure 1, a face view of a half-sole, and in Figure 2 a transverse section of a half-sole.

This invention relates to an improvement in the manufacture of India-rubber soles, whereby the entire face of the sole may be covered by India rubber, and thesaid India rubber formed so as to be attached to the sole in like manner as ordinary soles. V

Heretoi'ore soles of India rubber havebecn formed with an edge of leather the said edge being for the purpose of securing the sole to the boot or shoe. So far as the India-rubber part of the sole extends, so far only is the sole water-proof; the edge soon fills with water, and the eiipansion and contraction by thus wetting and drying are detrimental to the successful wear of the sole, as well as making the sole not what it is intended to be, aperfectly water-proof sole, consequently an objection to such soles.

By my improvement these objections are entirely overcome, and the whole sole rendered perfectly waterproof; and my invention consists in preparing the India rubber for the soles, and placing it in a mould of the proper form, whether it be whole solo, half sole, or heel, and then vulcanizing the whole; and in the preparation of curing or vulcanizing, a narrow strip or .portion, A, of the sole around the edge'is rendered much harder than the central or body portion B, and so hard as to be in proper condition to peg or stitch onto the boot or shoe. The central portion being of the common soft preparation, the edge may be hardened by the usual preparation and process of curing; or, if preferred, strips of fabric may be introduced around the edge, to render the edge snfiiciently non-elastic for the purpose of peggingpr sewing; but, however prepared, the gum for the sole and edge is placed in the mould, and the whole vulcanized together at one and the same time.

I do not wish to be understood as broadly claiming an India-rubber sole for boots and shoes; but

What I do claim, and desire to secure by Letters Patent, is V The rubber sole described, the edge of which is formed of a harder compound than the body of the sole, and the whole formed and finished by the process of vulcanization, and so as to be attached to the boot or shoe in the manner set forth.

R. S. PIOKETT. Witnesses:

J 01m E. EARLE, Jonnli. SHUMWAY. 

